Weaver No. 63BS Base Marlin Standard One Piece Detachable Top-Mount Base Silver

Each Weaver base is machined to the tightest tolerances for a custom fit. They are designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring.
Features and Specifications:
Fits Marlin 9, 45, 30AS, 36, 62, 93, 336, 375, 444, 1893, 1894, 1895, Glenfield 30, Zane Gray, Camp-9 Carbine, 922M & 989
Includes custom-hardened fastening screws for mounting